Ionia Weather Forecast

    • 26
    • 39

    Gradual Clearing

    • 39
    • 50

    Rain Showers

    • 22
    • 41

    Snow Likely

    • 26
    • 39

    Chance Rain/Snow

    • 19
    • 34

    Mostly Cloudy

    • 21
    • 28

    Chance Rain/Snow

    • 25
    • 39

    Chance Rain/Snow

Today 17 Dec Ontario

Cloudy. Highs Ranging from the mid 30s on the Hilltops to around 40 across the lower Elevations. West Winds 10 to 20 Mph with Gusts up to 40 Mph.

Tonight 17 Dec Ontario

Mostly cloudy Early, then becoming partly cloudy. Lows in the mid 20s. West Winds 10 to 15 Mph with Gusts up to 30 Mph, becoming south.

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Ionia Temperature Statistics

December Temperature

Rochester, Greater Rochester International Airport (15.5 miles)

  • Lowest 8 December, 2025

    3.9 °F

  • Average December

    23.7 °F

  • Highest 10 December, 2025

    37 °F

Climate (2020–Present)

Rochester, Greater Rochester International Airport (15.5 miles)

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  • Average Low 2020–2025

    42.4 °F

  • Average 2020–2025

    50.9 °F

  • Average High 2020–2025

    59.5 °F
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